改進成(cheng)套設(she)備的功(gong)能，添(tian)加單(dan)相(xiang)接(jie)(jie)地毛(mao)病就近檢測和阻隔，關于中性(xing)點不接(jie)(jie)地和經消弧線(xian)(xian)圈接(jie)(jie)地毛(mao)病處理辦法也將是一項重大的技能革新。提升配網(wang)單(dan)相(xiang)接(jie)(jie)地毛(mao)病選(xuan)線(xian)(xian)成(cheng)功(gong)率(lv)、探(tan)索完善(shan)接(jie)(jie)地毛(mao)病阻隔技能。

現有(you)接(jie)地(di)毛(mao)病(bing)選(xuan)(xuan)線(xian)維護(hu)主要選(xuan)(xuan)用中(zhong)性(xing)(xing)點經小(xiao)電(dian)(dian)阻(zu)(zu)接(jie)地(di)辦(ban)(ban)法下(xia)的(de)零(ling)序電(dian)(dian)流維護(hu)或中(zhong)性(xing)(xing)點非有(you)用接(jie)地(di)辦(ban)(ban)法下(xia)的(de)小(xiao)電(dian)(dian)流接(jie)地(di)選(xuan)(xuan)線(xian)維護(hu)，在面臨高(gao)阻(zu)(zu)、間(jian)歇性(xing)(xing)等毛(mao)病(bing)時，仍(reng)存(cun)在選(xuan)(xuan)線(xian)準(zhun)確(que)率差，無(wu)法有(you)用阻(zu)(zu)隔毛(mao)病(bing)，存(cun)在巨大隱患。當高(gao)阻(zu)(zu)接(jie)地(di)到達1000歐(ou)姆以上時，設備(bei)動(dong)(dong)作牢靠率80%；設備(bei)動(dong)(dong)作后選(xuan)(xuan)線(xian)準(zhun)確(que)率90%。毛(mao)病(bing)檢(jian)測精度(du)差開(kai)關(guan)拒(ju)動(dong)(dong)誤動(dong)(dong)率高(gao)，導致配電(dian)(dian)網(wang)牢靠性(xing)(xing)下(xia)降。

從配(pei)(pei)(pei)電(dian)(dian)(dian)(dian)網(wang)(wang)(wang)規劃規劃下手(shou)合理(li)的(de)(de)選擇中(zhong)(zhong)性點接(jie)(jie)(jie)地(di)(di)辦法(fa)，開(kai)展高低壓(ya)開(kai)關柜成套設(she)(she)備(bei)技能(neng)研(yan)究，開(kai)展小(xiao)電(dian)(dian)(dian)(dian)流(liu)接(jie)(jie)(jie)地(di)(di)體系單相(xiang)接(jie)(jie)(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)(bing)選線(xian)(xian)辦法(fa)的(de)(de)研(yan)究，進一步提高單相(xiang)接(jie)(jie)(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)(bing)選線(xian)(xian)的(de)(de)準確(que)率。選用小(xiao)電(dian)(dian)(dian)(dian)流(liu)接(jie)(jie)(jie)地(di)(di)體系的(de)(de)區域要(yao)裝備(bei)接(jie)(jie)(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)(bing)線(xian)(xian)段判別(bie)與阻隔設(she)(she)備(bei)。國家電(dian)(dian)(dian)(dian)網(wang)(wang)(wang)正(zheng)在修訂的(de)(de)《配(pei)(pei)(pei)電(dian)(dian)(dian)(dian)網(wang)(wang)(wang)技能(neng)導則》規則變電(dian)(dian)(dian)(dian)站要(yao)安(an)裝牢靠的(de)(de)選線(xian)(xian)設(she)(she)備(bei)，在10s內切除的(de)(de)接(jie)(jie)(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)(bing)。在小(xiao)電(dian)(dian)(dian)(dian)流(liu)接(jie)(jie)(jie)地(di)(di)配(pei)(pei)(pei)電(dian)(dian)(dian)(dian)網(wang)(wang)(wang)中(zhong)(zhong)，消弧(hu)線(xian)(xian)圈(quan)將接(jie)(jie)(jie)地(di)(di)電(dian)(dian)(dian)(dian)流(liu)降至只有(you)幾(ji)個安(an)培，盡管有(you)利于熄(xi)弧(hu)，但也(ye)使毛(mao)(mao)(mao)病(bing)(bing)線(xian)(xian)路的(de)(de)工頻零(ling)序電(dian)(dian)(dian)(dian)流(liu)往往小(xiao)于非(fei)毛(mao)(mao)(mao)病(bing)(bing)線(xian)(xian)路的(de)(de)電(dian)(dian)(dian)(dian)流(liu)并(bing)且二者的(de)(de)相(xiang)位也(ye)根本相(xiang)同，毛(mao)(mao)(mao)病(bing)(bing)線(xian)(xian)路工頻零(ling)序電(dian)(dian)(dian)(dian)流(liu)沒有(you)了(le)差異與非(fei)毛(mao)(mao)(mao)病(bing)(bing)線(xian)(xian)路的(de)(de)特征，這關于單相(xiang)接(jie)(jie)(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)(bing)檢(jian)測來(lai)說(shuo)正(zheng)確(que)選線(xian)(xian)是(shi)困難的(de)(de)。

10KV電(dian)力體系(xi)大多是小電(dian)流接地體系(xi)，當(dang)體系(xi)中產(chan)生(sheng)單相接地時(shi)，不(bu)會產(chan)生(sheng)很大的(de)(de)短(duan)路電(dian)流。毛病(bing)點(dian)電(dian)弧(hu)(hu)經(jing)過(guo)消弧(hu)(hu)線(xian)圈補償感抗后能(neng)夠自行(xing)平(ping)息，熄弧(hu)(hu)后接地址(zhi)絕緣可(ke)自行(xing)康復，能(neng)主動(dong)鏟(chan)除(chu)單相接地毛病(bing)。如果間(jian)歇(xie)性弧(hu)(hu)光不(bu)能(neng)平(ping)息，長時(shi)間(jian)帶電(dian)運(yun)轉會造成(cheng)諧(xie)振過(guo)電(dian)壓(ya)，產(chan)生(sheng)幾倍于正常(chang)的(de)(de)過(guo)電(dian)壓(ya)，過(guo)電(dian)壓(ya)將進一(yi)步(bu)使線(xian)路上的(de)(de)絕緣層(ceng)絕緣子擊穿，造成(cheng)嚴峻的(de)(de)相間(jian)短(duan)路事端。不(bu)管是哪種情況(kuang)都須要對毛病(bing)點(dian)定位，隨后趕快組織維(wei)修(xiu)毛病(bing)點(dian)。單相接地毛病(bing)產(chan)生(sheng)后能(neng)維(wei)持運(yun)轉一(yi)定時(shi)間(jian)，因此大大提高了供電(dian)牢(lao)靠性。

配電開關(guan)的(de)一二次成套設(she)備的(de)技能(neng)研(yan)發，是為了更好(hao)的(de)標準配網主設(she)備，保障建(jian)(jian)造(zao)過程中一二次同步(bu)建(jian)(jian)造(zao)投運(yun)，防止后期的(de)改造(zao)，關(guan)于(yu)縮(suo)短(duan)施工期、提高(gao)牢靠性及運(yun)維功率、簡化投標流(liu)程等(deng)具有重要(yao)意(yi)義。